Android - adb shell呈現系統目前資訊 (dumpsys)

不裝任何apk也想知道目前的電池狀況嗎?
直接下指令就可以了

adb shell dumpsys battery

就會秀出:

Current Battery Service state:
  AC powered: false
  USB powered: true
  status: 2
  health: 2
  present: true
  level: 26
  scale: 100
  voltage:3747
  temperature: 318
  technology: Li-ion


其它有關adb shell dumpsys 後面的參數還有很多用法，總共如下:
  SurfaceFlinger
  accessibility
  account
  activity
  alarm
  appwidget
  audio
  backup
  battery
  batteryinfo
  bluetooth
  bluetooth_a2dp
  bluetooth_dg_service
  bluetooth_fm_receiver_service
  clipboard
  connectivity
  content
  cpuinfo
  device_policy
  devicestoragemonitor
  diskstats
  dropbox
  entropy
  hardware
  htc_checkin
  htchardware
  input_method
  iphonesubinfo
  isms
  location
  media.audio_flinger
  media.audio_policy
  media.camera
  media.player
  meminfo
  mount
  netstat
  network_management
  notification
  package
  permission
  phone
  power
  search
  sensor
  simphonebook
  statusbar
  telephony.registry
  throttle
  uimode
  usagestats
  usbnet
  userbehavior
  vibrator
  wallpaper
  wifi
  window


如果什麼參數都不加，直接打adb shell dumpsys，就會出現全部的資訊了。